Optical imaging lens

ABSTRACT

An optical imaging lens including a first to a seventh lens elements arranged in sequence from an object side to an image side along an optical axis is provided. Each lens element includes an object-side surface and an image-side surface. An optical axis region of the image-side surface of the first lens element is concave. An optical axis region of the object-side surface of the third lens element is concave. The fourth lens element has positive refracting power and an optical axis region of the image-side surface of the fourth lens element is concave. An optical axis region of the image-side surface of the fifth lens element is concave. Furthermore, other optical imaging lenses are also provided.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation application of and claims thepriority benefit of U.S. application Ser. No. 16/429,067, filed on Jun.3, 2019, now allowed. The prior U.S. application Ser. No. 16/429,067 isa continuation application of and claims the priority benefit of U.S.application Ser. No. 15/915,068, filed on Mar. 8, 2018, now patented,which claims the priority benefit of Chinese application serial no.201711477924.0, filed on Dec. 29, 2017. The entirety of each of theabove-mentioned patent applications is hereby incorporated by referenceherein and made a part of this specification.

BACKGROUND OF THE INVENTION Field of the Invention

The invention is related to an optical element, and particularly to anoptical imaging lens.

Description of Related Art

Dimension of consumer electronics is ever-changing, and demands forcompact and slim products have been increased; therefore, it isinevitable that the specification of essential component of electronicproducts such as optical lens must be improved continuously in order tomeet consumers' need. The most important characteristic of optical lenslies in imaging quality and size. In addition, it is increasinglyimportant to enhance field of view as well as expand characteristic ofaperture. When it comes to imaging quality, along with advancement ofimaging sensing technology, consumers' requirement for imaging qualityis higher. Accordingly, in the field of optical lens design, apart frompursing slimness of lens, the imaging quality and performance of lensneed to be taken into consideration as well.

However, the design of an optical lens with good imaging quality andminiaturized size cannot be achieved by simply reducing the proportionof lens with good imaging quality. The design process not only involvesproperty of materials but also actual manufacturing issues such asproduction and yield rate. In particular, the technical difficulty ofminiaturized lens is significantly higher than that of conventionallens. Therefore, it has been an objective for practitioners in the fieldto find out how to fabricate an optical lens that meets the requirementof consumer electronics while keeping improving the imaging qualitythereof.

SUMMARY OF THE INVENTION

The invention provides an optical imaging lens which has good opticalproperty and larger half field of view.

An embodiment of the invention provides an optical imaging lensincluding a first lens element, a second lens element, a third lenselement, a fourth lens element, a fifth lens element, a sixth lenselement, and a seventh lens element arranged in a sequence from anobject side to an image side along an optical axis. Each of the lenselements includes an object-side surface facing the object side andallowing an imaging ray to pass through and an image-side surface facingthe image side and allowing the imaging ray to pass through. The lenselement of the optical imaging lens having refracting power onlyincludes the above-mentioned seven lens elements. A periphery region ofan image-side surface of the second lens element is concave. A peripheryregion of an object-side surface of the third lens element is concave. Aperiphery region of an object-side surface of the sixth lens element isconcave. An optical axis region of an image-side surface of the sixthlens element is a convex. The optical imaging lens meets the followingcondition expression: V1−(V3+V4)≥−10.000. V1 is an Abbe number of thefirst lens element. V3 is an Abbe number of the third element. V4 is anAbbe number of the fourth lens element.

In summary of the above, the advantageous effect of the optical imaginglens in the embodiment of the invention lies in: by controlling thedesign and arrangement of concave-convex curved surfaces of theabove-mentioned lens element while satisfying the condition expressionV1−(V3+V4)≥−10.000, the optical imaging lens in the embodiment of theinvention can achieve good optical property and expand field of view.

In order to make the aforementioned features and advantages of thedisclosure more comprehensible, embodiments accompanying figures aredescribed in detail below.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are included to provide a furtherunderstanding of the invention, and are incorporated in and constitute apart of this specification. The drawings illustrate embodiments of theinvention and, together with the description, serve to explain theprinciples of the invention.

FIG. 1 is a schematic view illustrating a surface structure of a lenselement.

FIG. 2 is a schematic view illustrating a concave and convex surfacestructure of a lens element and a ray focal point.

FIG. 3 is a schematic view illustrating a surface structure of a lenselement according to a first example.

FIG. 4 is a schematic view illustrating a surface structure of a lenselement according to a second example.

FIG. 5 is a schematic view illustrating a surface structure of a lenselement according to a third example.

FIG. 6 is a schematic view illustrating an optical imaging lensaccording to a first embodiment of the invention.

FIG. 7A to FIG. 7D are diagrams illustrating longitudinal sphericalaberration and other aberrations of the optical imaging lens accordingto the first embodiment of the invention.

FIG. 8 shows detailed optical data pertaining to the optical imaginglens according to the first embodiment of the invention.

FIG. 9 shows aspheric parameters pertaining to the optical imaging lensaccording to the first embodiment of the invention.

FIG. 10 is a schematic view illustrating an optical imaging lensaccording to a second embodiment of the invention.

FIG. 11A to FIG. 11D are diagrams illustrating longitudinal sphericalaberration and other aberrations of the optical imaging lens accordingto the second embodiment of the invention.

FIG. 12 shows detailed optical data pertaining to the optical imaginglens according to the second embodiment of the invention.

FIG. 13 shows aspheric parameters pertaining to the optical imaging lensaccording to the second embodiment of the invention.

FIG. 14 is a schematic view illustrating an optical imaging lensaccording to a third embodiment of the invention.

FIG. 15A to FIG. 15D are diagrams illustrating longitudinal sphericalaberration and other aberrations of the optical imaging lens accordingto the third embodiment of the invention.

FIG. 16 shows detailed optical data pertaining to the optical imaginglens according to the third embodiment of the invention.

FIG. 17 shows aspheric parameters pertaining to the optical imaging lensaccording to the third embodiment of the invention.

FIG. 18 is a schematic view illustrating an optical imaging lensaccording to a fourth embodiment of the invention.

FIG. 19A to FIG. 19D are diagrams illustrating longitudinal sphericalaberration and other aberrations of the optical imaging lens accordingto the fourth embodiment of the invention.

FIG. 20 shows detailed optical data pertaining to the optical imaginglens according to the fourth embodiment of the invention.

FIG. 21 shows aspheric parameters pertaining to the optical imaging lensaccording to the fourth embodiment of the invention.

FIG. 22 is a schematic view illustrating an optical imaging lensaccording to a fifth embodiment of the invention.

FIG. 23A to FIG. 23D are diagrams illustrating longitudinal sphericalaberration and other aberrations of the optical imaging lens accordingto the fifth embodiment of the invention.

FIG. 24 shows detailed optical data pertaining to the optical imaginglens according to the fifth embodiment of the invention.

FIG. 25 shows aspheric parameters pertaining to the optical imaging lensaccording to the fifth embodiment of the invention.

FIG. 26 is a schematic view illustrating an optical imaging lensaccording to a sixth embodiment of the invention.

FIG. 27A to FIG. 27D are diagrams illustrating longitudinal sphericalaberration and other aberrations of the optical imaging lens accordingto the sixth embodiment of the invention.

FIG. 28 shows detailed optical data pertaining to the optical imaginglens according to the sixth embodiment of the invention.

FIG. 29 shows aspheric parameters pertaining to the optical imaging lensaccording to the sixth embodiment of the invention.

FIG. 30 is a schematic view illustrating an optical imaging lensaccording to a seventh embodiment of the invention.

FIG. 31A to FIG. 31D are diagrams illustrating longitudinal sphericalaberration and other aberrations of the optical imaging lens accordingto the seventh embodiment of the invention.

FIG. 32 shows detailed optical data pertaining to the optical imaginglens according to the seventh embodiment of the invention.

FIG. 33 shows aspheric parameters pertaining to the optical imaging lensaccording to the seventh embodiment of the invention.

FIG. 34 is a schematic view illustrating an optical imaging lensaccording to an eighth embodiment of the invention.

FIG. 35A to FIG. 35D are diagrams illustrating longitudinal sphericalaberration and other aberrations of the optical imaging lens accordingto the eighth embodiment of the invention.

FIG. 36 shows detailed optical data pertaining to the optical imaginglens according to the eighth embodiment of the invention.

FIG. 37 shows aspheric parameters pertaining to the optical imaging lensaccording to the eighth embodiment of the invention.

FIG. 38 and FIG. 39 show important parameters and relation valuesthereof pertaining to the optical imaging lenses according to the firstthrough the fourth embodiments of the invention.

FIG. 40 and FIG. 41 show important parameters and relation valuesthereof pertaining to the optical imaging lenses according to the fifththrough the eighth embodiments of the invention.

DESCRIPTION OF THE EMBODIMENTS

In the present disclosure, the optical system may comprise at least onelens element to receive imaging rays that are incident on the opticalsystem over a set of angles ranging from parallel to an optical axis toa half field of view (HFOV) angle with respect to the optical axis. Theimaging rays pass through the optical system to produce an image on animage plane. The term “a lens element having positive refracting power(or negative refracting power)” means that the paraxial refracting powerof the lens element in Gaussian optics is positive (or negative). Theterm “an object-side (or image-side) surface of a lens element” refersto a specific region of that surface of the lens element at whichimaging rays can pass through that specific region. Imaging rays includeat least two types of rays: a chief ray Lc and a marginal ray Lm (asshown in FIG. 1 ). An object-side (or image-side) surface of a lenselement can be characterized as having several regions, including anoptical axis region, a periphery region, and, in some cases, one or moreintermediate regions, as discussed more fully below.

FIG. 1 is a radial cross-sectional view of a lens element 100. Tworeferential points for the surfaces of the lens element 100 can bedefined: a central point, and a transition point. The central point of asurface of a lens element is a point of intersection of that surface andthe optical axis I. As illustrated in FIG. 1 , a first central point CP1may be present on the object-side surface 110 of lens element 100 and asecond central point CP2 may be present on the image-side surface 120 ofthe lens element 100. The transition point is a point on a surface of alens element, at which the line tangent to that point is perpendicularto the optical axis I. The optical boundary OB of a surface of the lenselement is defined as a point at which the radially outermost marginalray Lm passing through the surface of the lens element intersects thesurface of the lens element. All transition points lie between theoptical axis I and the optical boundary OB of the surface of the lenselement. If multiple transition points are present on a single surface,then these transition points are sequentially named along the radialdirection of the surface with reference numerals starting from the firsttransition point. For example, the first transition point, e.g., TP1,(closest to the optical axis I), the second transition point, e.g., TP2,(as shown in FIG. 4 ), and the Nth transition point (farthest from theoptical axis I).

The region of a surface of the lens element from the central point tothe first transition point TP1 is defined as the optical axis region,which includes the central point. The region located radially outside ofthe farthest Nth transition point from the optical axis I to the opticalboundary OB of the surface of the lens element is defined as theperiphery region. In some embodiments, there may be intermediate regionspresent between the optical axis region and the periphery region, withthe number of intermediate regions depending on the number of thetransition points.

The shape of a region is convex if a collimated ray being parallel tothe optical axis I and passing through the region is bent toward theoptical axis I such that the ray intersects the optical axis I on theimage side A2 of the lens element. The shape of a region is concave ifthe extension line of a collimated ray being parallel to the opticalaxis I and passing through the region intersects the optical axis I onthe object side A1 of the lens element.

Additionally, referring to FIG. 1 , the lens element 100 may also have amounting portion 130 extending radially outward from the opticalboundary OB. The mounting portion 130 is typically used to physicallysecure the lens element to a corresponding element of the optical system(not shown). Imaging rays do not reach the mounting portion 130. Thestructure and shape of the mounting portion 130 are only examples toexplain the technologies, and should not be taken as limiting the scopeof the present disclosure. The mounting portion 130 of the lens elementsdiscussed below may be partially or completely omitted in the followingdrawings.

Referring to FIG. 2 , optical axis region Z1 is defined between centralpoint CP and first transition point TP1. Periphery region Z2 is definedbetween TP1 and the optical boundary OB of the surface of the lenselement. Collimated ray 211 intersects the optical axis I on the imageside A2 of lens element 200 after passing through optical axis regionZ1, i.e., the focal point of collimated ray 211 after passing throughoptical axis region Z1 is on the image side A2 of the lens element 200at point R in FIG. 2 . Accordingly, since the ray itself intersects theoptical axis I on the image side A2 of the lens element 200, opticalaxis region Z1 is convex. On the contrary, collimated ray 212 divergesafter passing through periphery region Z2. The extension line EL ofcollimated ray 212 after passing through periphery region Z2 intersectsthe optical axis I on the object side A1 of lens element 200, i.e., thefocal point of collimated ray 212 after passing through periphery regionZ2 is on the object side A1 at point M in FIG. 2 . Accordingly, sincethe extension line EL of the ray intersects the optical axis I on theobject side A1 of the lens element 200, periphery region Z2 is concave.In the lens element 200 illustrated in FIG. 2 , the first transitionpoint TP1 is the border of the optical axis region and the peripheryregion, i.e., TP1 is the point at which the shape changes from convex toconcave.

Alternatively, there is another way for a person having ordinary skillin the art to determine whether an optical axis region is convex orconcave by referring to the sign of “Radius” (the “R” value), which isthe paraxial radius of shape of a lens surface in the optical axisregion. The R value is commonly used in conventional optical designsoftware such as Zemax and CodeV. The R value usually appears in thelens data sheet in the software. For an object-side surface, a positiveR value defines that the optical axis region of the object-side surfaceis convex, and a negative R value defines that the optical axis regionof the object-side surface is concave. Conversely, for an image-sidesurface, a positive R value defines that the optical axis region of theimage-side surface is concave, and a negative R value defines that theoptical axis region of the image-side surface is convex. The resultfound by using this method should be consistent with the methodutilizing intersection of the optical axis by rays/extension linesmentioned above, which determines surface shape by referring to whetherthe focal point of a collimated ray being parallel to the optical axis Iis on the object-side or the image-side of a lens element. As usedherein, the terms “a shape of a region is convex (concave),” “a regionis convex (concave),” and “a convex- (concave-) region,” can be usedalternatively.

FIG. 3 , FIG. 4 and FIG. 5 illustrate examples of determining the shapeof lens element regions and the boundaries of regions under variouscircumstances, including the optical axis region, the periphery region,and intermediate regions as set forth in the present specification.

FIG. 3 is a radial cross-sectional view of a lens element 300. Asillustrated in FIG. 3 , only one transition point TP1 appears within theoptical boundary OB of the image-side surface 320 of the lens element300. Optical axis region Z1 and periphery region Z2 of the image-sidesurface 320 of lens element 300 are illustrated. The R value of theimage-side surface 320 is positive (i.e., R>0). Accordingly, the opticalaxis region Z1 is concave.

In general, the shape of each region demarcated by the transition pointwill have an opposite shape to the shape of the adjacent region(s).Accordingly, the transition point will define a transition in shape,changing from concave to convex at the transition point or changing fromconvex to concave. In FIG. 3 , since the shape of the optical axisregion Z1 is concave, the shape of the periphery region Z2 will beconvex as the shape changes at the transition point TP1.

FIG. 4 is a radial cross-sectional view of a lens element 400. Referringto FIG. 4 , a first transition point TP1 and a second transition pointTP2 are present on the object-side surface 410 of lens element 400. Theoptical axis region Z1 of the object-side surface 410 is defined betweenthe optical axis I and the first transition point TP1. The R value ofthe object-side surface 410 is positive (i.e., R>0). Accordingly, theoptical axis region Z1 is convex.

The periphery region Z2 of the object-side surface 410, which is alsoconvex, is defined between the second transition point TP2 and theoptical boundary OB of the object-side surface 410 of the lens element400. Further, intermediate region Z3 of the object-side surface 410,which is concave, is defined between the first transition point TP1 andthe second transition point TP2. Referring once again to FIG. 4 , theobject-side surface 410 includes an optical axis region Z1 locatedbetween the optical axis I and the first transition point TP1, anintermediate region Z3 located between the first transition point TP1and the second transition point TP2, and a periphery region Z2 locatedbetween the second transition point TP2 and the optical boundary OB ofthe object-side surface 410. Since the shape of the optical axis regionZ1 is designed to be convex, the shape of the intermediate region Z3 isconcave as the shape of the intermediate region Z3 changes at the firsttransition point TP1, and the shape of the periphery region Z2 is convexas the shape of the periphery region Z2 changes at the second transitionpoint TP2.

FIG. 5 is a radial cross-sectional view of a lens element 500. Lenselement 500 has no transition point on the object-side surface 510 ofthe lens element 500. For a surface of a lens element with no transitionpoint, for example, the object-side surface 510 the lens element 500,the optical axis region Z1 is defined as the region between 0-50% of thedistance between the optical axis I and the optical boundary OB of thesurface of the lens element and the periphery region is defined as theregion between 50%-100% of the distance between the optical axis I andthe optical boundary OB of the surface of the lens element. Referring tolens element 500 illustrated in FIG. 5 , the optical axis region Z1 ofthe object-side surface 510 is defined between the optical axis I and50% of the distance between the optical axis I and the optical boundaryOB. The R value of the object-side surface 510 is positive (i.e., R>0).Accordingly, the optical axis region Z1 is convex. For the object-sidesurface 510 of the lens element 500, because there is no transitionpoint, the periphery region Z2 of the object-side surface 510 is alsoconvex. It should be noted that lens element 500 may have a mountingportion (not shown) extending radially outward from the periphery regionZ2.

FIG. 6 is a schematic view illustrating an optical imaging lensaccording to a first embodiment of the invention. FIG. 7A to FIG. 7D arediagrams illustrating longitudinal spherical aberration and otheraberrations of the optical imaging lens according to the firstembodiment of the invention. Referring to FIG. 6 , according to a firstembodiment of the invention, an optical imaging lens 10 includes anaperture 0, a first lens element 1, a second lens element 2, a thirdlens element 3, a fourth lens element 4, a fifth lens element 5, a sixthlens element 6, a seventh lens element 7 and a filter 9 (e.g. IR cutfilter) arranged in a sequence from an object side A1 to an image sideA2 along an optical axis I of the optical imaging lens 10. When a lightemitted from an object to be captured enters the optical imaging lens 10and passes through the aperture 0, the first lens element 1, the secondlens element 2, the third lens element 3, the fourth lens element 4, thefifth lens element 5, the sixth lens element 6, the seventh lens element7 and the filter 9 in sequence, an image is formed on an image plane 99.The filter 9 is disposed between the seventh lens element 7 and theimage plane 99. It should be noted that the object side A1 is a sidefacing the object to be captured, and the image side A2 is a side facingthe image plane 99.

In the embodiment, each of the first lens element 1, the second lenselement 2, the third lens element 3, the fourth lens element 4, thefifth lens element 5, the sixth lens element 6, the seventh lens element7 and the filter 9 of the optical imaging lens 10 respectively has anobject-side surface 15, 25, 35, 45, 55, 65, 75 and 95 facing the objectside A1 and allowing an imaging ray to pass through as well as animage-side surface 16, 26, 36, 46, 56, 66, 76 and 96 facing the imageside A2 and allowing the imaging ray to pass through. In the embodiment,the aperture 0 is disposed in front of the first lens element 3.

The first lens element 1 has positive refracting power. The material ofthe first lens element 1 is plastic. An optical axis region 151 of theobject-side surface 15 of the first lens element 1 is convex, and aperiphery region 153 of the object-side surface 15 of the first lenselement 1 is convex. An optical axis region 162 of the image-sidesurface 16 of the first lens element 1 is concave, and a peripheryregion 163 of the image-side surface 16 of the first lens element 1 isconvex. In the embodiment, the object-side surface 15 and the image-sidesurface 16 of the first lens element 1 are aspheric surfaces.

The second lens element 2 has negative refracting power. The material ofthe second lens element 2 is plastic. An optical axis region 251 of theobject-side surface 25 of the second lens element 2 is convex, and aperiphery region 253 of the object-side surface 25 of the second lenselement 2 is convex. An optical axis region 262 of the image-sidesurface 26 of the second lens element 2 is concave, and a peripheryregion 264 of the image-side surface 26 of the second lens element 2 isconcave. In the embodiment, the object-side surface 25 and theimage-side surface 26 of the second lens element 2 are asphericsurfaces.

The third lens element 3 has negative refracting power. The material ofthe third lens element 3 is plastic. An optical axis region 351 of theobject-side surface 35 of the third lens element 3 is a convex, and aperiphery region 354 of the object-side surface 35 of the third lenselement 3 is concave. An optical axis region 362 of the image-sidesurface 36 of the third lens element 3 is concave, and a peripheryregion 363 of the image-side surface 36 of the third lens element 3 isconvex. In the embodiment, the object-side surface 35 and the image-sidesurface 36 of the third lens element 3 are aspheric surfaces.

The fourth lens element 4 has positive refracting power. The material ofthe fourth lens element 4 is plastic. An optical axis region 451 of theobject-side surface 45 of the fourth lens element 4 is convex, and aperiphery region 454 of the object-side surface 45 of the fourth lenselement 4 is concave. An optical axis region 462 of the image-sidesurface 46 of the fourth lens element 4 is concave, and a peripheryregion 463 of the image-side surface 46 of the fourth lens element 4 isconvex. In the embodiment, the object-side surface 45 and the image-sidesurface 46 of the fourth lens element 4 are aspheric surfaces.

The fifth lens element 5 has negative refracting power. The material ofthe fifth lens element 5 is plastic. An optical axis region 551 of theobject-side surface 55 of the fifth lens element 5 is a convex, and aperiphery region 554 of the object-side surface 55 of the fifth lenselement 5 is concave. An optical axis region 562 of the image-sidesurface 56 of the fifth lens element 5 is concave, and a peripheryregion 563 of the image-side surface 56 of the fifth lens element 5 isconvex. In the embodiment, the object-side surface 55 and the image-sidesurface 56 of the fifth lens element 5 are aspheric surfaces.

The sixth lens element 6 has positive refracting power. The material ofthe sixth lens element 6 is plastic. An optical axis region 651 of theobject-side surface 65 of the sixth lens element 6 is convex, and aperiphery region 654 of the object-side surface 65 of the sixth lenselement 6 is concave. An optical axis region 661 of the image-sidesurface 66 of the sixth lens element 6 is convex, and a periphery region663 of the image-side surface 66 of the sixth lens element 6 is convex.In the embodiment, the object-side surface 65 and the image-side surface66 of the sixth lens element 6 are aspheric surfaces.

The seventh lens element 7 has negative refracting power. The materialof the seventh lens element 7 is plastic. An optical axis region 752 ofthe object-side surface 75 of the seventh lens element 7 is a concave,and a periphery region 754 of the object-side surface 75 of the seventhlens element 7 is concave. An optical axis region 762 of the image-sidesurface 76 of the seventh lens element 7 is concave, and a peripheryregion 763 of the image-side surface 76 of the seventh lens element 7 isconvex. In the embodiment, the object-side surface 75 and the image-sidesurface 76 of the seventh lens element 7 are aspheric surfaces.

In the embodiment, the lens elements having refracting power of theoptical imaging lens 10 only includes the above-mentioned seven lenselements.

Other detailed optical data of the first embodiment is as shown in FIG.8 . In the first embodiment, a system length of the optical imaging lens10 is 6.463 mm, the total effective focal length (EFL) is 5.045 mm, thehalf field of view is 34.340°, the image height is 3.500 mm, theF-number (Fno) is 1.580, wherein the system length refers to a distancefrom the object-side surface 15 of the first lens element 1 to the imageplane 99 along the optical axis I.

Additionally, in the embodiment, a total of fourteen surfaces, namelyobject-side surfaces 15, 25, 35, 45, 55, 65 and 75 as well as theimage-side surfaces 16, 26, 36, 46, 56, 66 and 76 of the first lenselement 1, the second lens element 2, the third lens element 3, thefourth lens element 4, the fifth lens element 5, the sixth lens element6 and the seventh lens element 7 are general even asphere surfaces. Theaspheric surfaces are defined by on the following equation:

$\begin{matrix}{{Z(Y)} = {{\frac{Y^{2}}{R}/\left( {1 + \sqrt{1 - {\left( {1 + K} \right)\frac{Y^{2}}{R^{2}}}}} \right)} + {\sum\limits_{i = 1}^{n}{a_{2i} \times Y^{2i}}}}} & (1)\end{matrix}$

Y: a distance from a point on an aspheric curve to the optical axis;

Z: a depth of the aspheric surface (i.e. a perpendicular distancebetween the point on the aspheric surface that is spaced by the distanceY from the optical axis and a tangent plane tangent to a vertex of theaspheric surface on the optical axis);

R: radius of curvature of the surface of the lens element;

K: conic constant

a_(2i):2i^(th) aspheric coefficient

Each aspheric coefficient from the object-side surface 15 of the firstlens element 1 to the image-side surface 76 of the seventh lens element7 in the equation (1) is indicated in FIG. 9 . In FIG. 9 , thereferential number 15 is one column that represents the asphericcoefficient of the object-side surface 15 of the first lens element 1,and the reference numbers in other columns can be deduced from theabove.

Additionally, the relationship among the important parameters pertainingto the optical imaging lens 10 of the first embodiment is indicated inFIG. 38 and FIG. 39 . Specifically, in FIG. 38 , the unit of value fromrow T1 to row GFP and from row EFL to TTL is millimeter (mm).

wherein,

V1 is an Abbe number of the first lens element 1;

V2 is an Abbe number of the second lens element 2;

V3 is an Abbe number of the third lens element 3;

V4 is an Abbe number of the fourth lens element 4;

V5 is an Abbe number of the fifth lens element 5;

V6 is an Abbe number of the sixth lens element 6;

V7 is an Abbe number of the seventh lens element 7;

T1 represents the center thickness of the first lens element 1 along theoptical axis I;

T2 represents the center thickness of the second lens element 2 alongthe optical axis I;

T3 represents the center thickness of the third lens element 3 along theoptical axis I;

T4 represents the center thickness of the fourth lens element 4 alongthe optical axis I;

T5 represents the center thickness of the fifth lens element 5 along theoptical axis I;

T6 represents the center thickness of the sixth lens element 6 along theoptical axis I;

T7 represents the center thickness of the seventh lens element 7 alongthe optical axis I;

G12 represents an air gap between the first lens element 1 and thesecond lens element 2 along the optical axis I;

G23 represents an air gap between the second lens element 2 and thethird lens element 3 along the optical axis I;

G34 represents an air gap between the third lens element 3 and thefourth lens element 4 along the optical axis I;

G45 represents an air gap between the fourth lens element 4 and thefifth lens element 5 along the optical axis I;

G56 represents an air gap between the fifth lens element 5 and the sixthlens element 6 along the optical axis I;

G67 represents an air gap between the sixth lens element 6 and theseventh lens element 7 along the optical axis I;

G7F represents an air gap between the seventh lens element 7 and thefilter 9 along the optical axis I;

TF represents a center thickness of the filter 9 along the optical axisI; GFP represents an air gap between the filter 9 and the image plane 99along the optical axis I;

AAG represents a sum of six air gaps among the first lens element 1through the seventh lens element 7 along the optical axis I, i.e., thesum of gaps G12, G23, G34, G45, G56 and G67;

ALT represents a sum of center thicknesses of seven lens elementsincluding the first lens element 1 through the seventh lens element 7along the optical axis I, i.e., the sum of center thicknesses T1, T2,T3, T4, T5, T6 and T7;

EFL represents an effective focal length of the optical lens assembly10; BFL represents a distance from the image-side surface 76 of theseventh lens element 7 to the image plane 99 of the optical imaging lens10 along the optical axis I;

TTL represents a distance from the object-side surface 15 of the firstlens element 1 to the image plane 99 of the optical imaging lens 10along the optical axis I;

TL represents a distance from the object-side surface 15 of the firstlens element 1 to the image-side surface 76 of the seventh lens element7 along the optical axis I;

HFOV represents the half field of view of the optical imaging lens 10.

With reference to FIG. 7A to FIG. 7D, FIG. 7A is a diagram describingthe longitudinal spherical aberration in the first embodiment in thecondition that the pupil radius is 1.5967 mm; FIG. 7B and FIG. 7C arediagrams respectively describing the field curvature aberration in thesagittal direction and the field curvature aberration in the tangentialdirection on the image plane 99 of the first embodiment in the conditionthat the wavelength is 470 nm, 555 nm and 650 nm. FIG. 7D is a diagramdescribing distortion aberration of the image plane 99 of the firstembodiment in the condition that the wavelength is 470 nm, 555 nm and650 nm. In FIG. 7A showing the longitudinal spherical aberration of thefirst embodiment, the curve of each wavelength is close to one anotherand near the middle position, which shows that the off-axis ray of eachwavelength at different heights are focused near the imaging point. Theskew margin of the curve of each wavelength shows that the imaging pointdeviation of the off-axis ray at different heights is controlled withina range of ±0.025 mm. Therefore, it is evident that the first embodimentcan significantly improve spherical aberration of the same wavelength.Additionally, the distances between the three representative wavelengthsare close to one another, which represents that the imaging positions ofthe rays with different wavelengths are concentrated, therefore, thechromatic aberration can be significantly improved.

In FIGS. 7B and 7C which illustrate two diagrams of field curvatureaberration, the focal length variation of the three representativewavelengths in the entire field of view falls within a range of ±0.025mm, which represents that the optical system in the first embodiment caneffectively eliminate aberration. In FIG. 7D, the diagram of distortionaberration shows that the distortion aberration in the first embodimentcan be maintained within a range of ±2.5%, which shows that thedistortion aberration in the first embodiment can meet the imagingquality requirement of the optical system. Based on the above, it isshown that the first embodiment can provide good image quality comparedwith existing optical imaging lens under the condition where the systemlength of the optical imaging lens is shortened to about 6.463 mm.

FIG. 10 is a schematic view illustrating an optical imaging lensaccording to a second embodiment of the invention, FIGS. 11A to 11D arediagrams illustrating longitudinal spherical aberration and otheraberrations of the optical imaging lens according to the secondembodiment of the invention. Referring to FIG. 10 , the secondembodiment of the optical imaging lens 10 of the invention is similar tothe first embodiment, and the difference lies in optical data, asphericcoefficients and the parameters of the lens elements 1, 2, 3, 4, 5, 6and 7, and a periphery region 564 of the image-side surface 56 of thefifth lens element 5 is concave. It should be noted that, in order toshow the view clearly, some numerals which are the same as those usedfor the optical axis region and the periphery region in the firstembodiment are omitted in FIG. 10 .

Detailed optical data pertaining to the optical imaging lens 10 is asshown in FIG. 12 . In the second embodiment, the system length of theoptical imaging lens 10 is 6.657 mm, the total effective focal length is4.918 mm, the half field of view (HFOV) is 33.570°, the image height is3.500 mm and the f-number (Fno) is 1.582.

FIG. 13 shows each aspheric coefficient pertaining to the object-sidesurface 15 of the first lens element 1 through the image-side surface 76of the seventh lens element 7 in the equation (1) in the secondembodiment.

Additionally, the relationship among the important parameters pertainingto the optical imaging lens 10 of the second embodiment is indicated inFIG. 38 and FIG. 39 .

In FIG. 11A which illustrates longitudinal spherical aberration of thesecond embodiment in the condition that the pupil radius is 1.5565 mm,the imaging point deviation of the off-axis ray at different heights iscontrolled within a range of ±0.017 mm. In FIGS. 11B and 11C whichillustrate two diagrams of field curvature aberration, the focal lengthvariation of the three representative wavelengths in the entire field ofview falls within a range of ±0.05 mm. In FIG. 11D, the diagram ofdistortion aberration shows that the distortion aberration in the secondembodiment can be maintained within a range of ±8.0%. In view of theabove, the second embodiment is easier to be manufactured and has higheryield rate as compared to the first embodiment.

Based on the above, it can be derived that the longitudinal aberrationof the second embodiment is smaller than the longitudinal aberration ofthe first embodiment.

FIG. 14 is a schematic view illustrating an optical imaging lensaccording to a third embodiment of the invention, FIGS. 15A to 15D arediagrams illustrating longitudinal spherical aberration and otheraberrations of the optical imaging lens according to the thirdembodiment of the invention. Referring to FIG. 14 , the third embodimentof the optical imaging lens 10 of the invention is similar to the firstembodiment, and the difference lies in optical data, asphericcoefficients and the parameters of the lens elements 1, 2, 3, 4, 5, 6and 7. It should be noted that, in order to show the view clearly, somenumerals which are the same as those used for the optical axis regionand the periphery region in the first embodiment are omitted in FIG. 14.

Detailed optical data pertaining to the optical imaging lens 10 is asshown in FIG. 16 . In the third embodiment, the system length of theoptical imaging lens 10 is 6.609 mm, the total effective focal length is4.928 mm, the half field of view (HFOV) is 34.561°, the image height is3.500 mm and the f-number (Fno) is 1.583.

FIG. 17 shows each aspheric coefficient pertaining to the object-sidesurface 15 of the first lens element 1 through the image-side surface 76of the seventh lens element 7 in the equation (1) in the thirdembodiment.

Additionally, the relationship among the important parameters pertainingto the optical imaging lens 10 of the third embodiment is indicated inFIG. 38 and FIG. 39 .

In FIG. 15A which illustrates longitudinal spherical aberration of thethird embodiment in the condition that the pupil radius is 1.5597 mm,the imaging point deviation of the off-axis ray at different heights iscontrolled within a range of ±0.02 mm. In FIGS. 15B and 15C whichillustrate two diagrams of field curvature aberration, the focal lengthvariation of the three representative wavelengths in the entire field ofview falls within a range of ±0.045 mm. In FIG. 15D, the diagram ofdistortion aberration shows that the distortion aberration in the thirdembodiment can be maintained within a range of ±3.2%. In view of theabove, the third embodiment is easier to be manufactured and has higheryield rate as compared to the first embodiment.

In view of the above, it can be derived that the half field of view ofthe third embodiment is larger than the half field of view of the firstembodiment, and the longitudinal spherical aberration of the thirdembodiment is smaller than the longitudinal spherical aberration of thefirst embodiment.

FIG. 18 is a schematic view illustrating an optical imaging lensaccording to a fourth embodiment of the invention, FIGS. 19A to 19D arediagrams illustrating longitudinal spherical aberration and otheraberrations of the optical imaging lens according to the fourthembodiment of the invention. Referring to FIG. 18 , the fourthembodiment of the optical imaging lens 10 of the invention is similar tothe first embodiment, and the difference lies in optical data, asphericcoefficients and the parameters of the lens elements 1, 2, 3, 4, 5, 6and 7. It should be noted that, in order to show the view clearly, somenumerals which are the same as those used for the optical axis regionand the periphery region in the first embodiment are omitted in FIG. 18.

Detailed optical data pertaining to the optical imaging lens 10 is asshown in FIG. 20 . In the fourth embodiment, the system length of theoptical imaging lens 10 is 6.526 mm, the total effective focal length is5.145 mm, the half field of view (HFOV) is 34.006°, the image height is3.500 mm and the f-number (Fno) is 1.581.

FIG. 21 shows each aspheric coefficient pertaining to the object-sidesurface 15 of the first lens element 1 through the image-side surface 76of the seventh lens element 7 in the equation (1) in the fourthembodiment.

Additionally, the relationship among the important parameters pertainingto the optical imaging lens 10 of the fourth embodiment is indicated inFIG. 38 and FIG. 39 .

In FIG. 19A which illustrates longitudinal spherical aberration of thefourth embodiment in the condition that the pupil radius is 1.6284 mm,the imaging point deviation of the off-axis ray at different heights iscontrolled within a range of ±0.035 mm. In FIGS. 19B and 19C whichillustrate two diagrams of field curvature aberration, the focal lengthvariation of the three representative wavelengths in the entire field ofview falls within a range of ±0.045 mm. In FIG. 19D, the diagram ofdistortion aberration shows that the distortion aberration in the fourthembodiment can be maintained within a range of ±2.0%. In view of theabove, the fourth embodiment is easier to be manufactured and has higheryield rate as compared to the first embodiment.

Based on the above, it can be derived that the distortion aberration ofthe fourth embodiment is smaller than the distortion aberration of thefirst embodiment.

FIG. 22 is a schematic view illustrating an optical imaging lensaccording to a fifth embodiment of the invention, FIGS. 23A to 23D arediagrams illustrating longitudinal spherical aberration and otheraberrations of the optical imaging lens according to the fifthembodiment of the invention. Referring to FIG. 22 , the fifth embodimentof the optical imaging lens 10 of the invention is similar to the firstembodiment, and the difference lies in optical data, asphericcoefficients and the parameters of the lens elements 1, 2, 3, 4, 5, 6and 7, and the third lens element 3 has positive refracting power. Itshould be noted that, in order to show the view clearly, some numeralswhich are the same as those used for the optical axis region and theperiphery region in the first embodiment are omitted in FIG. 22 .

Detailed optical data pertaining to the optical imaging lens 10 is asshown in FIG. 24 . In the fifth embodiment, the system length of theoptical imaging lens 10 is 6.535 mm, the total effective focal length is5.044 mm, the half field of view (HFOV) is 34.375°, the image height is3.500 and the f-number (Fno) is 1.581.

FIG. 25 shows each aspheric coefficient pertaining to the object-sidesurface 15 of the first lens element 1 through the image-side surface 76of the seventh lens element 7 in the equation (1) in the fifthembodiment.

Additionally, the relationship among the important parameters pertainingto the optical imaging lens 10 of the fifth embodiment is indicated inFIG. 40 and FIG. 41 . Specifically, in FIG. 40 , the unit of value fromrow T1 to row GFT and from row EFL to row TTL is millimeter (mm).

In FIG. 23A which illustrates longitudinal spherical aberration of thefifth embodiment in the condition that the pupil radius is 1.5963 mm,the imaging point deviation of the off-axis ray at different heights iscontrolled within a range of ±0.028 mm. In FIGS. 23B and 23C whichillustrate two diagrams of field curvature aberration, the focal lengthvariation of the three representative wavelengths in the entire field ofview falls within a range of ±0.03 mm. In FIG. 23D, the diagram ofdistortion aberration shows that the distortion aberration in the fifthembodiment can be maintained within a range of ±2.0%. In view of theabove, the fifth embodiment is easier to be manufactured and has higheryield rate as compared to the first embodiment.

Based on the above, it can be derived that the half field of view of thefifth embodiment is larger than the half field of view of the firstembodiment, and the distortion aberration of the fifth embodiment issmaller than the distortion aberration of the first embodiment.

FIG. 26 is a schematic view illustrating an optical imaging lensaccording to a sixth embodiment of the invention, FIGS. 27A to 27D arediagrams illustrating longitudinal spherical aberration and otheraberrations of the optical imaging lens according to the sixthembodiment of the invention. Referring to FIG. 26 , the sixth embodimentof the optical imaging lens 10 of the invention is similar to the firstembodiment, and the difference lies in optical data, asphericcoefficients and the parameters of the lens elements 1, 2, 3, 4, 5, 6and 7, and a periphery region 564 of the image-side surface 56 of thefifth lens element 5 is concave. It should be noted that, in order toshow the view clearly, some numerals which are the same as those usedfor the optical axis region and the periphery region in the firstembodiment are omitted in FIG. 26 .

Detailed optical data pertaining to the optical imaging lens 10 is asshown in FIG. 28 . In the sixth embodiment, the system length of theoptical imaging lens 10 is 6.609 mm, the total effective focal length is4.909 mm, the half field of view (HFOV) is 35.096°, the image height is3.500 mm and the f-number (Fno) is 1.584.

FIG. 29 shows each aspheric coefficient pertaining to the object-sidesurface 15 of the first lens element 1 through the image-side surface 76of the seventh lens element 7 in the equation (1) in the sixthembodiment.

Additionally, the relationship among the important parameters pertainingto the optical imaging lens 10 of the sixth embodiment is indicated inFIG. 40 and FIG. 41 .

In FIG. 27A which illustrates longitudinal spherical aberration of thesixth embodiment in the condition that the pupil radius is 1.5536 mm,the imaging point deviation of the off-axis ray at different heights iscontrolled within a range of ±0.015 mm. In FIGS. 27B and 27C whichillustrate two diagrams of field curvature aberration, the focal lengthvariation of the three representative wavelengths in the entire field ofview falls within a range of ±0.035 mm. In FIG. 27D, the diagram ofdistortion aberration shows that the distortion aberration in the sixthembodiment can be maintained within a range of ±2.5%. In view of theabove, the sixth embodiment is easier to be manufactured and has higheryield rate as compared to the first embodiment.

Based on the above, it can be derived that the half field of view of thesixth embodiment is larger than the half field of view of the firstembodiment, and the longitudinal spherical aberration of the sixthembodiment is smaller than the longitudinal spherical aberration of thefirst embodiment.

FIG. 30 is a schematic view illustrating an optical imaging lensaccording to a seventh embodiment of the invention, FIGS. 31A to 31D arediagrams illustrating longitudinal spherical aberration and otheraberrations of the optical imaging lens according to the seventhembodiment of the invention. Referring to FIG. 30 , the seventhembodiment of the optical imaging lens 10 of the invention is similar tothe first embodiment, and the difference lies in optical data, asphericcoefficients and the parameters of the lens elements 1, 2, 3, 4, 5, 6and 7. It should be noted that, in order to show the view clearly, somenumerals which are the same as those used for the optical axis regionand the periphery region in the first embodiment are omitted in FIG. 30.

Detailed optical data pertaining to the optical imaging lens 10 is asshown in FIG. 32 . In the seventh embodiment, the system length of theoptical imaging lens 10 is 6.303 mm, the total effective focal length is4.951 mm, the half field of view (HFOV) is 34.675°, the image height is3.500 and the f-number (Fno) is 1.587.

FIG. 33 shows each aspheric coefficient pertaining to the object-sidesurface 15 of the first lens element 1 through the image-side surface 76of the seventh lens element 7 in the equation (1) in the seventhembodiment.

Additionally, the relationship among the important parameters pertainingto the optical imaging lens 10 of the seventh embodiment is indicated inFIG. 40 and FIG. 41 .

In FIG. 31A which illustrates longitudinal spherical aberration of theseventh embodiment in the condition that the pupil radius is 1.5667 mm,the imaging point deviation of the off-axis ray at different heights iscontrolled within a range of ±0.018 mm. In FIGS. 31B and 31C whichillustrate two diagrams of field curvature aberration, the focal lengthvariation of the three representative wavelengths in the entire field ofview falls within a range of ±0.035 mm.

In FIG. 31D, the diagram of distortion aberration shows that thedistortion aberration in the seventh embodiment can be maintained withina range of ±3.0%. In view of the above, the seventh embodiment providesa good imaging quality as compared to the first embodiment in thecondition that the system length is reduced to about 6.303 mm.

Based on the above, it can be derived that the half field of view of theseventh embodiment is larger than the half field of view of the firstembodiment, and the longitudinal spherical aberration of the seventhembodiment is smaller than the longitudinal spherical aberration of thefirst embodiment.

FIG. 34 is a schematic view illustrating an optical imaging lensaccording to an eighth embodiment of the invention, FIGS. 35A to 35D arediagrams illustrating longitudinal spherical aberration and otheraberrations of the optical imaging lens according to the eighthembodiment of the invention. Referring to FIG. 34 , the eighthembodiment of the optical imaging lens 10 of the invention is similar tothe first embodiment, and the difference lies in optical data, asphericcoefficients and the parameters of the lens elements 1, 2, 3, 4, 5, 6and 7. It should be noted that, in order to show the view clearly, somenumerals which are the same as those used for the optical axis regionand the periphery region in the first embodiment are omitted in FIG. 34.

Detailed optical data pertaining to the optical imaging lens 10 is asshown in FIG. 36 . In the eighth embodiment, the system length of theoptical imaging lens 10 is 6.458 mm, the total effective focal length is5.002 mm, the half field of view (HFOV) is 34.558°, the image height is3.500 mm and the f-number (Fno) is 1.581.

FIG. 37 shows each aspheric coefficient pertaining to the object-sidesurface 15 of the first lens element 1 through the image-side surface 76of the seventh lens element 7 in the equation (1) in the eighthembodiment.

Additionally, the relationship among the important parameters pertainingto the optical imaging lens 10 of the eighth embodiment is indicated inFIG. 40 and FIG. 41 .

In FIG. 35A which illustrates longitudinal spherical aberration of theeighth embodiment in the condition that the pupil radius is 1.5830 mm,the imaging point deviation of the off-axis ray at different heights iscontrolled within a range of ±0.025 mm. In FIGS. 35B and 35C whichillustrate two diagrams of field curvature aberration, the focal lengthvariation of the three representative wavelengths in the entire field ofview falls within a range of ±0.025 mm. In FIG. 35D, the diagram ofdistortion aberration shows that the distortion aberration in the eighthembodiment can be maintained within a range of ±2.5%. In view of theabove, the eighth embodiment provides a good imaging quality as comparedto the first embodiment in the condition that the system length isreduced to 6.458 mm.

Based on the above, it can be derived that the system length of theeighth embodiment is smaller than the system length of the firstembodiment, and the half field of view of the eighth embodiment islarger than the half field of view of the first embodiment.

In order to shorten the system length of the optical imaging lens andensure optical quality, it is one of the means of the invention toshorten the air gap between lenses or properly shorten the thickness ofthe lenses. In the meantime, in consideration of manufacturingdifficulty, if the limitation of numerals as set forth in the conditionsbelow is satisfied, a better configuration may be attained.

-   -   The optical imaging lens 10 may satisfy the conditional        expression: (T2+T3+T4+T5+T7)/T2≤6.800, and a preferable range is        5.000≤(T2+T3+T4+T5+T7)/T2≤6.800;    -   the optical imaging lens 10 may satisfy the conditional        expression: (T1+T4+T5)/G23≤4.000, and a preferable range is        2.500≤(T1+T4+T5)/G23≤4.000;    -   the optical imaging lens 10 may satisfy the conditional        expression: ALT/T1≤4.500, and a preferable range is        3.400≤ALT/T1≤4.500;    -   the optical imaging lens 10 may satisfy the conditional        expression: AAG/T7≤3.700, and a preferable range is        2.400≤AAG/T7≤3.700;    -   the optical imaging lens 10 may satisfy the conditional        expression: AAG/(G23+T2)≤2.500; and a preferable range is        1.700≤AAG/(G23+T2)≤2.500;    -   the optical imaging lens 10 may satisfy the conditional        expression: ALT/(G12+G34+G45+G56)≤9.500, and a preferable range        is 5.300 ALT/(G12+G34+G45+G56)≤9.500;    -   the optical imaging lens 10 may satisfy the conditional        expression: (G23+G67)/T3≤3.500, and a preferable range is        2.100≤(G23+G67)/T3≤3.500;    -   the optical imaging lens 10 may satisfy the conditional        expression: (T2+T4+T6)/G67≤3.600, and a preferable range is        3.000≤(T2+T4+T6)/G67≤3.600;    -   the optical imaging lens 10 may satisfy the conditional        expression: ALT/G67≤7.200, and a preferable range is        6.000≤ALT/G67≤7.200;    -   the optical imaging lens 10 may satisfy the conditional        expression: ALT/(T1+T3+T5)≤2.600, and a preferable range is        2.000≤ALT/(T1+T3+T5)≤2.600;    -   the optical imaging lens 10 may satisfy the conditional        expression: AAG/G67≤3.200, and a preferable range is        2.200≤AAG/G67≤3.200;    -   the optical imaging lens 10 may satisfy the conditional        expression: AAG/(T2+T3)≤2.800, and a preferable range is        1.700≤AAG/(T2+T3)≤2.800;    -   the optical imaging lens 10 may satisfy the conditional        expression: BFL/G67≤2.800, and a preferable range is        1.000≤BFL/G67≤2.800;    -   the optical imaging lens 10 may satisfy the conditional        expression: EFL/T6≤4.700, and a preferable range is        3.000≤EFL/T6≤4.700.

The ratio of the parameter of the optical element to the length of theoptical imaging lens 10 is maintained to be within an appropriate rangeto avoid that the parameter of the optical element is too small for theoptical element to be produced, or avoid that the parameter of theoptical element is too large and consequently the length of the opticalimaging lens is too long. If the limitation of numerals as set forth inthe conditions below is satisfied, a better configuration may beattained.

-   -   The optical imaging lens 10 may satisfy the conditional        expression: TTL/(T1+T6)≤3.500, and a preferable range is        2.400≤TTL/(T1+T6)≤3.500;    -   the optical imaging lens 10 may satisfy the conditional        expression: TTL/(G23+G67)≤7.200, and a preferable range is        5.200≤TTL/(G23+G67)≤7.200;    -   the optical imaging lens 10 may satisfy the conditional        expression: TTL/(T3+T5+T6)≤4.000, and a preferable range is        2.800≤TTL/(T3+T5+T6)≤4.000;    -   the optical imaging lens 10 may satisfy the conditional        expression: TL/G67≤10.200, and a preferable range is        8.400≤TL/G67≤10.200;    -   the optical imaging lens 10 may satisfy the conditional        expression: TL/(T1+T7)≤4.200, and a preferable range is        3.300≤TL/(T1+T7)≤4.200.

In addition, it is optional to select a random combination relationshipof the parameter in the embodiment to increase limitation of the opticalimaging lens for the ease of designing the optical imaging lens havingthe same structure in the invention. Due to the unpredictability in thedesign of an optical system, with the framework of the embodiments ofthe invention, under the circumstances where the above-describedconditions are satisfied, the optical imaging lens according to theembodiments of the invention with shorter length, increased aperture,improved imaging quality, or better yield rate can be preferablyachieved so as to improve the shortcoming of prior art.

The above-limited relation is provided in an exemplary sense and can berandomly and selectively combined and applied to the embodiments of theinvention in different manners; the invention should not be limited tothe above examples. In implementation of the invention, apart from theabove-described relations, it is also possible to add additionaldetailed structure such as more concave and convex curvaturesarrangement of a specific lens element or a plurality of lens elementsso as to enhance control of system property and/or resolution. Forexample, the optical axis region of the object-side surface of the firstlens element is concave optionally. It should be noted that theabove-described details can be optionally combined and applied to theother embodiments of the invention under the condition where they arenot in conflict with one another.

Based on the above, the optical imaging lens 10 in the embodiment of theinvention can achieve the following effects and advantages:

1. The longitudinal spherical aberrations, astigmatism aberrations anddistortion aberrations of each of the embodiments of the invention areall complied with usage specifications. Moreover, the off-axis rays ofdifferent heights of the three representative wavelengths red, green andblue are all gathered around imaging points, and according to adeviation range of each curve, it can be seen that deviations of theimaging points of the off-axis rays of different heights are allcontrolled to achieve a good capability to suppress sphericalaberration, astigmatism aberration and distortion aberration. Furtherreferring to the imaging quality data, distances among the threerepresentative wavelengths red, green and blue are fairly close, whichrepresents that the optical imaging lens of the embodiments of theinvention has a good concentration of rays with different wavelengthsand under different states, and have an excellent capability to suppressdispersion, so it is learned that the optical imaging lens of theembodiments of the invention has good imaging quality.

2. A periphery region 264 of the image-side surface 26 of the secondlens element 2 is designed to be concave to operate together with aperiphery region 354 of the object-side surface 35 of the third lenselement 3 designed to be concave, which can facilitate ray convergence.

Also, the optical imaging lens 10 may collaborate with the design that aperiphery region 654 of the object-side surface 65 of the sixth lenselement 6 is concave and an optical axis region 661 of the image-sidesurface 66 of the sixth lens element 6 is convex, which facilitatescorrection of aberrations generated.

3. Also, the first lens element 1, the third lens element 3 and thefourth lens element 4 are incorporated so that the materials of theselens elements satisfy the condition expression: −10.000≤V1−(V3+V4); inthis manner, the length of lens system is shortened while the imagingquality can be ensured. Specifically, a preferable range is−10.000≤V1−(V3+V4)≤20.00.

The numeral range containing the maximum and minimum values obtainedthrough the combination of proportional relationship of the opticalparameter disclosed in each embodiment of the invention may be used forimplementation.

It will be apparent to those skilled in the art that variousmodifications and variations can be made to the structure of the presentinvention without departing from the scope or spirit of the invention.In view of the foregoing, it is intended that the present inventioncover modifications and variations of this invention provided they fallwithin the scope of the following claims and their equivalents.

What is claimed is:
 1. An optical imaging lens, comprising a first lenselement, a second lens element, a third lens element, a fourth lenselement, a fifth lens element, a sixth lens element and a seventh lenselement arranged in sequence from an object side to an image side alongan optical axis, each of the lens elements having an object-side surfacefacing the object side and allowing an imaging ray to pass through andan image-side surface facing the image side and allowing the imaging rayto pass through, only the first lens element, the second lens element,the third lens element, the fourth lens element, the fifth lens element,the sixth lens element and the seventh lens element of the opticalimaging lens having refracting power, wherein, an optical axis region ofthe image-side surface of the first lens element is concave; an opticalaxis region of the object-side surface of the second lens element isconvex; an optical axis region of the object-side surface of the thirdlens element is convex; an optical axis region of the object-sidesurface of the fourth lens element is convex, and an optical axis regionof the image-side surface of the fourth lens element is concave; and thefifth lens element has negative refracting power, wherein the opticalimaging lens satisfies the following condition expression:ALT/(T1+T3+T5)≤2.600, wherein ALT is a sum of center thicknesses of theseven lens elements including the first lens element through the seventhlens element along the optical axis, T1 is a center thickness of thefirst lens element along the optical axis, T3 is a center thickness ofthe third lens element along the optical axis, and T5 is a centerthickness of the fifth lens element along the optical axis.
 2. Theoptical imaging lens according to claim 1, wherein the optical imaginglens further satisfies the following condition expression:TTL/(T1+T6)≤3.500, wherein TTL is a distance from the object-sidesurface of the first lens element to an image plane of the opticalimaging lens along the optical axis, and T6 is a center thickness of thesixth lens element along the optical axis.
 3. The optical imaging lensaccording to claim 1, wherein the optical imaging lens further satisfiesthe following condition expression: (T2+T3+T4+T5+T7)/T2≤6.800, whereinT2 is a center thickness of the second lens element along the opticalaxis, T4 is a center thickness of the fourth lens element along theoptical axis, and T7 is a center thickness of the seventh lens elementalong the optical axis.
 4. The optical imaging lens according to claim1, wherein the optical imaging lens further satisfies the followingcondition expression: (T1+T4+T5)/G23≤4.000, wherein T4 is a centerthickness of the fourth lens element along the optical axis, and G23 isan air gap between the second lens element and the third lens elementalong the optical axis.
 5. The optical imaging lens according to claim1, wherein the optical imaging lens further satisfies the followingcondition expression: ALT/G67≤7.200, wherein G67 is an air gap betweenthe sixth lens element and the seventh lens element along the opticalaxis.
 6. The optical imaging lens according to claim 1, wherein theoptical imaging lens further satisfies the following conditionexpression: AAG/T7≤3.700, wherein AAG is a sum of six air gaps includingthe first lens element through the seventh lens element along theoptical axis, and T7 is a center thickness of the seventh lens elementalong the optical axis.
 7. The optical imaging lens according to claim1, wherein the optical imaging lens further satisfies the followingcondition expression: AAG/(G23+T2)≤2.500, wherein AAG is a sum of sixair gaps including the first lens element through the seventh lenselement along the optical axis, G23 is an air gap between the secondlens element and the third lens element along the optical axis, and T2is a center thickness of the second lens element along the optical axis.8. An optical imaging lens, comprising a first lens element, a secondlens element, a third lens element, a fourth lens element, a fifth lenselement, a sixth lens element and a seventh lens element arranged insequence from an object side to an image side along an optical axis,each of the lens elements having an object-side surface facing theobject side and allowing an imaging ray to pass through and animage-side surface facing the image side and allowing the imaging ray topass through, only the first lens element, the second lens element, thethird lens element, the fourth lens element, the fifth lens element, thesixth lens element and the seventh lens element of the optical imaginglens having refracting power, wherein, an optical axis region of theimage-side surface of the first lens element is concave; an optical axisregion of the object-side surface of the third lens element is convex;the fourth lens element has positive refracting power, and an opticalaxis region of the image-side surface of the fourth lens element isconcave; and an optical axis region of the image-side surface of thefifth lens element is concave, wherein the optical imaging lenssatisfies the following condition expression:ALT/(T1+T3+T5)≤2.600, wherein ALT is a sum of center thicknesses of theseven lens elements including the first lens element through the seventhlens element along the optical axis, T1 is a center thickness of thefirst lens element along the optical axis, T3 is a center thickness ofthe third lens element along the optical axis, and T5 is a centerthickness of the fifth lens element along the optical axis.
 9. Theoptical imaging lens according to claim 8, wherein an Abbe number of theseventh lens element is greater than an Abbe number of the fifth lenselement.
 10. The optical imaging lens according to claim 8, wherein theoptical imaging lens further satisfies the following conditionexpression: TTL/(G23+G67)≤7.200, wherein TTL is a distance from theobject-side surface of the first lens element to an image plane of theoptical imaging lens along the optical axis, G23 is an air gap betweenthe second lens element and the third lens element along the opticalaxis, and G67 is an air gap between the sixth lens element and theseventh lens element along the optical axis.
 11. The optical imaginglens according to claim 8, wherein the optical imaging lens furthersatisfies the following condition expression: TTL/(T3+T5+T6)≤4.000,wherein TTL is a distance from the object-side surface of the first lenselement to an image plane of the optical imaging lens along the opticalaxis, and T6 is a center thickness of the sixth lens element along theoptical axis.
 12. The optical imaging lens according to claim 8, whereinthe optical imaging lens further satisfies the following conditionexpression: ALT/T1≤4.500.
 13. The optical imaging lens according toclaim 8, wherein the optical imaging lens further satisfies thefollowing condition expression: (G23+G67)/T3≤3.500, wherein G23 is anair gap between the second lens element and the third lens element alongthe optical axis, and G67 is an air gap between the sixth lens elementand the seventh lens element along the optical axis.
 14. The opticalimaging lens according to claim 8, wherein the optical imaging lensfurther satisfies the following condition expression: TL/(T1+T7)≤4.200,wherein TL is a distance from of the object-side surface of the firstlens element to the image-side surface of the seventh lens element alongthe optical axis, and T7 is a center thickness of the seventh lenselement along the optical axis.
 15. An optical imaging lens, comprisinga first lens element, a second lens element, a third lens element, afourth lens element, a fifth lens element, a sixth lens element and aseventh lens element arranged in sequence from an object side to animage side along an optical axis, each of the lens elements having anobject-side surface facing the object side and allowing an imaging rayto pass through and an image-side surface facing the image side andallowing the imaging ray to pass through, only the first lens element,the second lens element, the third lens element, the fourth lenselement, the fifth lens element, the sixth lens element and the seventhlens element of the optical imaging lens having refracting power,wherein, an optical axis region of the image-side surface of the firstlens element is concave; an optical axis region of the object-sidesurface of the third lens element is convex; an optical axis region ofthe object-side surface of the fourth lens element is convex, and anoptical axis region of the image-side surface of the fourth lens elementis concave; the fifth lens element has negative refracting power, and anoptical axis region of the image-side surface of the fifth lens elementis concave; and an optical axis region of the object-side surface of thesixth lens element is convex.
 16. The optical imaging lens according toclaim 15, wherein an Abbe number of the sixth lens element is greaterthan an Abbe number of the fourth lens element.
 17. The optical imaginglens according to claim 15, wherein the optical imaging lens satisfiesthe following condition expression: (T2+T4+T6)/G67≤3.600, wherein T2 isa center thickness of the second lens element along the optical axis, T4is a center thickness of the fourth lens element along the optical axis,T6 is a center thickness of the sixth lens element along the opticalaxis, and G67 is an air gap between the sixth lens element and theseventh lens element along the optical axis.
 18. The optical imaginglens according to claim 15, wherein the optical imaging lens satisfiesthe following condition expression: V1−(V3+V4)≥−10.000, wherein V1 is anAbbe number of the first lens element, V3 is an Abbe number of the thirdelement, and V4 is an Abbe number of the fourth lens element.
 19. Theoptical imaging lens according to claim 15, wherein the optical imaginglens satisfies the following condition expression: AAG/(T2+T3)≤2.800,wherein AAG is a sum of six air gaps including the first lens elementthrough the seventh lens element along the optical axis, T2 is a centerthickness of the second lens element along the optical axis, and T3 is acenter thickness of the third lens element along the optical axis. 20.The optical imaging lens according to claim 15, wherein the opticalimaging lens satisfies the following condition expression:ALT/(G12+G34+G45+G56)≤9.500, wherein ALT is a sum of center thicknessesof the seven lens elements including the first lens element through theseventh lens element along the optical axis, G12 is an air gap betweenthe first lens element and the second lens element along the opticalaxis, G34 is an air gap between the third lens element and the fourthlens element along the optical axis, G45 is an air gap between thefourth lens element and the fifth lens element along the optical axis,and G56 is an air gap between the fifth lens element and the sixth lenselement along the optical axis.